Your heavy handed ipm maintenance isn’t doing your plant any favors. Oil base can clog leaf stomata.
Oils reduce transpiration rate, probably by blocking stomata and intercellular spaces.
Sounds like you are also applying more than required according to label PLUS if you don’t show active infestation - you are just wasting product .
Lost Coast Plant Therapy isn’t even organic - since use various elements. ( the OTHER filler elements listed )
Spray could even be causing the damage. I thought leaf miner for a second but then realized it looks more like just stress of some kind, maybe leaves were wet under direct sunlight, sprayed with too much products, Plant Therapy sprayed on plants during daylight hours will burn leaves. Also, Plant Therapy is definitely
not organic but it does use Natural ingredients. I use it religiously in my fertigation water and stock tanks (just a few drops works) to keep fungus gnats and other unwanted pests from harboring in it. I also enjoy the peppermint smell.
Also, when used as an IPM you can use drops of the stuff with success in my experience, just want to see a little bubbles on your water after a vigorous stir and you shouldn't see bugs in your pots or watering barrels/buckets/hoses etc unless they're dead and floating from making contact.
Years ago when I had a PM infestation I used 2 oz per gallon (double strength) with a Hudson Fogger with no issues and it completely eliminated the issue. I fogged the shit out of the whole plants with the LCPT then bleach mopped floors and fogged 360 degrees with full-strength diluted ZeroTol 2.0 solution, full PPE was worn lol.